Granted Patent
Utility
US 4,911,594 · App. 07/369,696
Push-nut type fastener
Inventor:
Charles Kenneth Fisher
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jun 21, 1989
Inventor
Charles Kenneth Fisher
Assignee (at issue)
TRW Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.